depending on who you ask but I'd say 2-3 years is a good number
Most oil companies will tell you between 2 to 4 years depending on the storage conditions. If I have something 4 years old I get rid of it.
Johnny, I'm sure there are folks here who would gladly "recycle" your 4-year-old oil.
So, what happens to the oil when it exceeds it's shelf life, be it 3 years, 4 years, or whatever (a Valvoline rep once told me indefinite shelf life)?
Thanks, Tall Paul (over 200 quarts on stash, some already hitting 4 years on the shelf